Silver chlorine with

Dry chlorine reacts with most metals combustively depending on temperature alurninum, arsenic, gold, mercury, selenium, teUerium, and tin react with dry CI2 in gaseous or Hquid form at ordinary temperatures carbon steel ignites at about 250°C depending on the physical shape and titanium reacts violendy with dry chlorine. Wet chlorine is very reactive because of the hydrochloric acid and hypochlorous acid (see eq. 37). Metals stable to wet chlorine include platinum, silver, tantalum, and titanium. Tantalum is the most stable to both dry and wet chlorine. 

Despite the existing uncertainty about the exact nature of the oxygen species present during reaction several different approaches have been reported which lead to an increase in the selectivity to ethylene oxide. These include alloying silver with other metals (14) and using different catalyst supports and various promoters (6,15). It is also known and industrially proven that the addition of few PPM of chlorinated hydrocarbon "moderators" to the gas feed improves the selectivity to ethylene oxide but decreases the catalyst activity (15). It has also been found recently by Carberry et al that selectivity increases with y-ir-radiation of the catalyst (16). 

Conversion of the resulting separate D-seco D-E trans i-vincadiffor-mine diols 198-201 to their primary tosylates and tertiary trimethylsilyl-oxy derivatives 202-205 and coupling to vindoline by the chlorination-silver tetrafluoroborate-potassium borohydride sequence provided amino tosylates 206-209, which could be directly subjected to cyclization or, alternatively, converted to the C-20 -C-21 epoxides 178, 181, 210, and 211 by reaction with tetrabutylammonium fluoride (Scheme 53). While cyclization of the tosylates 206-209 led essentially only to quaternary salts which could be debenzylated to provide the lower energy atropi-somer of vinblastine (1), leurosidine (56), vincovaline (184), and its C-20 epimer (212) respectively, cyclization of the epoxides 178, 181, 210, and... 

Since AgC103=AgCl + 30, if 0 = 16, it follows that the eq. wt. x of silver chloride must be 25-0795 8 + 16=74 9205 x, where x= 143 395. But 100 parts of silver are eq. to 32 8445 parts of chlorine, and henco 132 8445 parts of silver chloride will correspond with 132 8445 143 395 = 100 x, or = 107 942 parts of silver. Similarly for chlorine, since 132 8445 parts of chlorine unite with 107 942 parts of silver, 143 395 parts of silver chloride will contain 35 453 parts of chlorine. Hence, if 0 = 16, 0=36 463. Again for sodium, 32 8446 parts of chlorine combine with... 

Nas AsOs, does not react with the inorg salts of HNj, but with chloro- and iodoaxides it gives the alkali azide and halide and is ozidized to arsenate. Chlorine azide with silver azide forms Azino-Silver Chloride,... 

Chloride of Silver—hornsUver—Ag 01—is procured by adding a solution of chlorine, of hydrochlorfo acid, or of chloride of sodium, to nitrate of silver, or to any of the soluble salts of silver, with the exception of the hyposulphite. Thus—... 

Well-cooled sulphuryl chloride, diluted with 15-20 vols. of chloroform, is sat. with dry ammonia, the precipitated product dissolved in water, the soln. acidified with nitric acid, and the whole of the chlorine precipitated with silver nitrate the filtered soln. is neutralized with alkali, treated with silver nitrate, and the crystalline precipitate, which consists of silver sulphimide and some other silver derivative, separated by filtration. After adding a further quantity of silver nitrate, the clear soln. is treated with alkali, when silver sul-phamide is obtained as a colourless, amorphous precipitate, which, however, is invariably mixed with some other silver compound, probably the same as that present in the silver sulphimide precipitate. In order to remove this impurity, the well-washed precipitate is treated with hydrochloric acid in quantity exactly sufficient to convert the silver into chloride, and the strongly acid soln. is neutralized with ammonia and mixed with silver nitrate, when only the silver compound of unknown composition is precipitated pure silver sulphamide can now be precipitated by adding silver nitrate and excess of ammonia, and on decomposing this compound with the necessary quantity of hydrochloric acid, a neutral or feebly acid soln. of sulphamide is obtained. Sulphamide is deposited in large, colourless crystals when its aq. soln. is evaporated over sulphuric acid under reduced press. 

Iodine, bromine, and chlorine react with silver acetylides to give haloalkynes. An early report of such a reaction was applied to the first synthesis of perchloropheny-lacetylene (Scheme 1.58).130,131... 

Chlorine reacts with an aqueous solution of silver nitrate to form chloride and chlorate of silver, the hypochlorite being an intermediate product ... 

In a new study of neolactose, Richtmyer and Hudson improved the method of preparing acetochloroneolactose a 35-40% yield of the recrystallized material was obtained consistently by heating each 50 g. of octaacetyllactose in 350 ml. of absolute chloroform with 100 g. of powdered technical aluminum chloride and 50 g. of powdered phosphorus pentachloride for twenty minutes in a bath at 55-58°. By removing the chlorine atom with silver carbonate and aqueous acetone, and deacetylat-ing the heptaacetates thus formed (see Table II), they isolated the parent disaccharide. Crystalline neolactose had a rotation [a]D +34.6—> +35.5°, which is in agreement with the equilibrium value +35° reported by Kunz and Hudson" for sirupy neolactose. 

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